Truck that has been sitting for two years?

It also depends how it was stored. Outdoors, barn, garage, tent, so on and so forth. Being shielded from the sun is critical for preserving rubber parts (tires for example). If it was parked in a field or on grass, expect heavy rust and corrosion on the lower part of the truck. Inspect the interior for rodent damage, pay attention to the heater with that. The smell is terrible.

My Mack sat in a pole barn with a concrete floor for 13 years, I replaced all the fluids and batteries, and she fired right up. No major issues so far. I've got a small oil leak to take care of (which I noticed after changing the oil) The gasket that failed is on the side of the oil pan and requires draining the oil. Other than that the old gal seems to be okay.

 

And I would change all the oil engine trans and rears run it a couple weeks change the engine oil and do a oil sample

 

If it was sitting outside, there is a good chance it has bacteria in the fuel. You have to buy an expensive biocide to get rid of it. Its a real pain in the ###. It loves to plug up filters...

 

look for wiring damage. rat's, squirrels, love to live in sitting trucks & love to chew on wires & make nest's.

 

The diesel fuels is probably full of algae... my Pete sat for 20 months while fuel prices went crazy (and I tried a 40 hour job) and I had many plugged filters the first 5,000 miles.

You should drain as much old fuel as possible and use a good dose of algaecide to help clean the fuel system... Schaeffer Oil makes a good one as do others...

 

Along with about 4 gals of Sea Foam

 

Good point...